Calculators

Calculate percentages quickly and easily.

Calculate the percentage increase or decrease between two values.

Add, subtract, multiply and divide fractions and mixed numbers, with every step shown.

Convert fractions to decimals and decimals, including repeating ones, back to fractions.

Solve direct and inverse proportions instantly.

Calculate the average, sum, min and max of a list of numbers.

Calculate square, cube and nth roots, with the simplified radical form.

Raise any number to any power, including negative and decimal exponents, with exact big results.

Calculate logarithms in base 10, base e, base 2 or any other base.

Convert numbers to and from scientific, engineering and E notation.

Calculate n! exactly, even for large numbers, with its number of digits and trailing zeros.

Find the greatest common divisor and least common multiple of several numbers, with Euclid's algorithm.

Check whether a number is prime, and get its prime factorization and divisors.

Convert numbers to Roman numerals and Roman numerals back to numbers.

Convert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36.

Solve ax² + bx + c = 0 step by step, with the discriminant, vertex and graph.

Find the missing side of a right triangle, plus its angles, area and perimeter.

Calculate the area and perimeter of squares, rectangles, triangles, circles, trapezoids and more.

Calculate the volume, surface area and capacity of cubes, boxes, spheres, cylinders, cones and pyramids.

Estimate your monthly mortgage payment, with taxes, insurance and a full amortization schedule.

Calculate your monthly loan payment and total interest.

Work out the monthly payment and total cost of financing a car, and compare loan terms.

See how your money grows with compound interest, and how much the compounding frequency matters.

See how your savings grow with compound interest over time.

Find out how much to save each month to reach a goal, or how long it will take.

Calculate the return, gain and annualized yield on an investment.

Add or remove VAT / sales tax from a price.

Calculate the final price and savings from a discount.

Work out the tip and split the bill between people.

Calculate a sales commission, the rate behind it or the sale needed to earn it.

Compare products by price per kilo, liter or item to find the best deal.

Calculate your body mass index.

Find a healthy weight range for your height, with the classic ideal weight formulas.

Estimate how many calories you need each day to lose, maintain or gain weight.

Estimate the calories you burn walking, running, cycling, swimming and more.

Estimate your ovulation day, fertile window and next period.

Estimate your baby's due date and see how many weeks pregnant you are.

Find the best time to go to bed or wake up, based on 90-minute sleep cycles.

Find your age instantly.